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TIL after laying eggs, octopus moms’ only function is to protect and tend to their eggs because their brain shuts down except for the optic glands. They remain stationary for anywhere from months to years depending on the species of octopus, uninterested in food even when its offered to them.

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Wk9eo TIL that the jesus nut, in some helicopter designs, is the single nut that holds the helicopters rotors to the body of the air craft. The term came around in the Vietnam War, one of the first conflicts to make use of helicopters.
KlAa TIL that Mad Magazine publisher William Gaines once took his entire staff to Haiti to convince the sole Haitian subscriber to renew. When a neighbor also bought a subscription Gaines then declared the trip to be a financial success because the magazine had doubled its Haitian circulation.
RE77 TIL if you receive a blood transfusion with the wrong blood type, a very strong feeling that something bad is about to happen will occur within a few minutes.
4kJNw TIL that the heavily outnumbered British won the pivotal Battle of Plassey that started their conquest of India because they knew how to deal with rain. They covered their gunpowder while the Siraj's gunpowder got wet and unusable.
RWR8 TIL that beginning in the 1940s through the 1960s, the Quebec government collaborated with the Catholic Church to falsely certify 20,000 “orphaned” children as mentally ill and confine them to psychiatric institutions. The orphans were then subjected to medical experimentation and sexual abuse.